package com.lbb.utils.recycler

import android.graphics.Rect
import android.view.View
import androidx.recyclerview.widget.RecyclerView

class GridSpacingItemDecoration(private val spanCount: Int,private val spacing: Int,private val includeEdge: Boolean) : RecyclerView.ItemDecoration() {


    override fun getItemOffsets(
        outRect: Rect,
        view: View,
        parent: RecyclerView,
        state: RecyclerView.State
    ) {
       // super.getItemOffsets(outRect, view, parent, state)
        val position = parent.getChildAdapterPosition(view)
        val column = position % spanCount
        if (includeEdge) {
            outRect.left = spacing - column * spacing / spanCount
            outRect.right = (column + 1) * spacing / spanCount
            if (position < spanCount) {
                outRect.top = spacing
            }
            outRect.bottom = spacing
        } else {
            outRect.left = column * spacing / spanCount
            outRect.right = spacing - (column + 1) * spacing / spanCount
            if (position < spanCount) {
                outRect.top = spacing
            }
            outRect.bottom = spacing
        }
    }
}